Here are some cheats and tips for the game Pipe Dream.
PAOALPLA Start with 1 wrench
TAOALPLA Start with 6 wrenches
PAOALPLE Start with 9 wrenches
SZKTPUVK Infinite wrenches
AAOGZZIA One-way pipes from level 1
IAOGAZLA One-way pipes from level 5
ZAOKPZLE One-way pipes from level 10
KEUAUVSE Tunnels galore
GPKIEGZP Pumps instead of reservoirs
GPKIEGZP + ZPKINGGP Pumps before reservoirs